Data Organization and Data Control

EA1 Ch2

EA1 Ch2 Data Control and Data Organisation

Why are computers sometimes not working for no reasons?

S Notes_ Validation and Verification

Data Control

To get useful result, we have to make sure that the inputs are accurate. Data Control is all about ensuring the inputs are correct.

Ch.02 Data Organization and Data Control Check Digit and Parity Bit

Parity Bit & Check Digit

It is usually easy to understand validation check which validate reasonable data. However, for data that we not meaningful, like ID card number, it is hard to know if they are "reasonable" or not. Parity bits and check digits can help.

Ch.02 Data Organization and Data Control Database and Access Modes

Database and Access Modes

Database is used to store data and provide service for managing data effectively.

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